C# OpenCvSharp 模拟生成车辆运行视频

C# OpenCvSharp 模拟生成车辆运行视频

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效果

项目

代码

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效果

项目

代码

using OpenCvSharp;
using OpenCvSharp.Extensions;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

namespace OpenCvSharp_Demo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string image_path;

        Stopwatch stopwatch = new Stopwatch();

        private void Form1_Load(object sender, EventArgs e)
        {
            image_path = "bg_img.jpg";
            pictureBox1.Image = new Bitmap(image_path);
        }

        Mat bgImg;
        Mat car_bgra;
        Mat car;
        Mat mask;
        Rect roi;
        Mat pos;
        int x, y, width, height, step;

        private void button6_Click(object sender, EventArgs e)
        {
            x = Convert.ToInt32(txtX.Text);
            y = Convert.ToInt32(txtY.Text);
            width = Convert.ToInt32(txtW.Text);
            height = Convert.ToInt32(txtH.Text);

            Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));
            Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));

            textBox1.Text = string.Format("x={0};y={1}", x, y);

            ShowCar();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            y = y + step;
            ShowCar();
        }

        private void button7_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            x = x - step;
            ShowCar();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            y = y - step;
            ShowCar();
        }

        VideoCapture capture;
        Mat currentFrame = new Mat();
        private void button8_Click(object sender, EventArgs e)
        {
            capture = new VideoCapture("out.mp4");

            if (!capture.IsOpened())
            {
                MessageBox.Show("打开视频文件失败");
                return;
            }
            capture.Read(currentFrame);
            if (!currentFrame.Empty())
            {
                pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
                timer1.Interval = (int)(1000.0 / capture.Fps);
                timer1.Enabled = true;
            }

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            capture.Read(currentFrame);
            if (currentFrame.Empty())
            {
                //pictureBox1.Image = null;
                timer1.Enabled = false;
                capture.Release();
                textBox1.Text = "播放完毕。";
                return;
            }
            pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
        }

        bool ShowCar()
        {

            textBox1.Text = string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);
            txtX.Text = x.ToString();
            txtY.Text = y.ToString();
            txtW.Text = width.ToString();
            txtH.Text = height.ToString();

            roi = new Rect(x, y, width, height);

            if (x < 0)
            {
                x = 0;
                textBox1.Text = "位置越界";
                return false;
            }

            if (y < 0)
            {
                y = 0;
                textBox1.Text = "位置越界";
                return false;
            }

            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);

            if (roi.Bottom > bgImg.Height)
            {
                textBox1.Text = "位置越界";
                bgImg.Dispose();
                return false;
            }

            if (roi.Right > bgImg.Width)
            {
                textBox1.Text = "位置越界";
                bgImg.Dispose();
                return false;
            }

            pos = new Mat(bgImg, roi);
            car.CopyTo(pos, mask);
            pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());

            pos.Dispose();
            bgImg.Dispose();

            return true;

        }

        private void button3_Click(object sender, EventArgs e)
        {
            step = Convert.ToInt32(txtStep.Text);
            x = x + step;
            ShowCar();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
            car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);
            car = Cv2.ImRead("car1.png", ImreadModes.Color);
            //透明图
            //B,G,R,A   B,G,R -> 0 黑色 255 白色
            //A为透明度 -> 255为不透明，0为全透。
            var alphaBgr = Cv2.Split(car_bgra);
            mask = alphaBgr[3];

            x = 0;
            y = 0;
            width = car.Cols;
            height = car.Rows;

            ShowCar();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            x = 1120;
            y = 0;
            width = 400;
            height = 400;

            Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));
            Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
            Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));
            bgImg = Cv2.ImRead(image_path, ImreadModes.Color);

            VideoWriter vwriter = new VideoWriter("out.mp4", FourCC.X264, 30, new OpenCvSharp.Size(bgImg.Width, bgImg.Height));

            int count = 0;
            for (int i = 0; i < 200; i++)
            {
                y = y + 10;

                width = width + 2;
                height = height + 2;

                car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);
                car = Cv2.ImRead("car1.png", ImreadModes.Color);

                Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));
                Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));

                var alphaBgr = Cv2.Split(car_bgra);
                mask = alphaBgr[3];

                roi = new Rect(x, y, width, height);

                if (roi.Bottom > bgImg.Height)
                {
                    textBox1.Text = "位置越界";
                    break;
                }

                if (roi.Right > bgImg.Width)
                {
                    textBox1.Text = "位置越界";
                    break;
                }

                bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
                pos = new Mat(bgImg, roi);
                car.CopyTo(pos, mask);

                Cv2.ImWrite("out/" + i + ".jpg", bgImg);
                vwriter.Write(bgImg);
                count++;
                //pos.Dispose();
                //bgImg.Dispose();
            }
            pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());

            //Cv2.ImWrite("result.jpg", bgImg);
            //double costTime = stopwatch.Elapsed.TotalMilliseconds;
            //textBox1.Text = $"耗时:{costTime:F2}ms";
            textBox1.Text = "生成完毕！count=" + count.ToString();
            textBox1.Text += string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);
            vwriter.Release();
        }
    }
}

  1. using OpenCvSharp;
  2. using OpenCvSharp.Extensions;
  3. using System;
  4. using System.Diagnostics;
  5. using System.Drawing;
  6. using System.Windows.Forms;
  7.  
  8. namespace OpenCvSharp_Demo
  9. {
  10.     public partial class Form1 : Form
  11.     {
  12.         public Form1()
  13.         {
  14.             InitializeComponent();
  15.         }
  16.  
  17.         string image_path;
  18.  
  19.         Stopwatch stopwatch = new Stopwatch();
  20.  
  21.         private void Form1_Load(object sender, EventArgs e)
  22.         {
  23.             image_path = "bg_img.jpg";
  24.             pictureBox1.Image = new Bitmap(image_path);
  25.         }
  26.  
  27.         Mat bgImg;
  28.         Mat car_bgra;
  29.         Mat car;
  30.         Mat mask;
  31.         Rect roi;
  32.         Mat pos;
  33.         int x, y, width, height, step;
  34.  
  35.         private void button6_Click(object sender, EventArgs e)
  36.         {
  37.             x = Convert.ToInt32(txtX.Text);
  38.             y = Convert.ToInt32(txtY.Text);
  39.             width = Convert.ToInt32(txtW.Text);
  40.             height = Convert.ToInt32(txtH.Text);
  41.  
  42.             Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));
  43.             Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
  44.  
  45.             textBox1.Text = string.Format("x={0};y={1}", x, y);
  46.  
  47.             ShowCar();
  48.         }
  49.  
  50.         private void button5_Click(object sender, EventArgs e)
  51.         {
  52.             step = Convert.ToInt32(txtStep.Text);
  53.             y = y + step;
  54.             ShowCar();
  55.         }
  56.  
  57.         private void button7_Click(object sender, EventArgs e)
  58.         {
  59.             step = Convert.ToInt32(txtStep.Text);
  60.             x = x - step;
  61.             ShowCar();
  62.         }
  63.  
  64.         private void button1_Click(object sender, EventArgs e)
  65.         {
  66.             step = Convert.ToInt32(txtStep.Text);
  67.             y = y - step;
  68.             ShowCar();
  69.         }
  70.  
  71.         VideoCapture capture;
  72.         Mat currentFrame = new Mat();
  73.         private void button8_Click(object sender, EventArgs e)
  74.         {
  75.             capture = new VideoCapture("out.mp4");
  76.  
  77.             if (!capture.IsOpened())
  78.             {
  79.                 MessageBox.Show("打开视频文件失败");
  80.                 return;
  81.             }
  82.             capture.Read(currentFrame);
  83.             if (!currentFrame.Empty())
  84.             {
  85.                 pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
  86.                 timer1.Interval = (int)(1000.0 / capture.Fps);
  87.                 timer1.Enabled = true;
  88.             }
  89.  
  90.         }
  91.  
  92.         private void timer1_Tick(object sender, EventArgs e)
  93.         {
  94.             capture.Read(currentFrame);
  95.             if (currentFrame.Empty())
  96.             {
  97.                 //pictureBox1.Image = null;
  98.                 timer1.Enabled = false;
  99.                 capture.Release();
  100.                 textBox1.Text = "播放完毕。";
  101.                 return;
  102.             }
  103.             pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
  104.         }
  105.  
  106.         bool ShowCar()
  107.         {
  108.  
  109.             textBox1.Text = string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);
  110.             txtX.Text = x.ToString();
  111.             txtY.Text = y.ToString();
  112.             txtW.Text = width.ToString();
  113.             txtH.Text = height.ToString();
  114.  
  115.             roi = new Rect(x, y, width, height);
  116.  
  117.             if (x < 0)
  118.             {
  119.                 x = 0;
  120.                 textBox1.Text = "位置越界";
  121.                 return false;
  122.             }
  123.  
  124.             if (y < 0)
  125.             {
  126.                 y = 0;
  127.                 textBox1.Text = "位置越界";
  128.                 return false;
  129.             }
  130.  
  131.             bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
  132.  
  133.             if (roi.Bottom > bgImg.Height)
  134.             {
  135.                 textBox1.Text = "位置越界";
  136.                 bgImg.Dispose();
  137.                 return false;
  138.             }
  139.  
  140.             if (roi.Right > bgImg.Width)
  141.             {
  142.                 textBox1.Text = "位置越界";
  143.                 bgImg.Dispose();
  144.                 return false;
  145.             }
  146.  
  147.             pos = new Mat(bgImg, roi);
  148.             car.CopyTo(pos, mask);
  149.             pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());
  150.  
  151.             pos.Dispose();
  152.             bgImg.Dispose();
  153.  
  154.             return true;
  155.  
  156.         }
  157.  
  158.         private void button3_Click(object sender, EventArgs e)
  159.         {
  160.             step = Convert.ToInt32(txtStep.Text);
  161.             x = x + step;
  162.             ShowCar();
  163.         }
  164.  
  165.         private void button2_Click(object sender, EventArgs e)
  166.         {
  167.             bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
  168.             car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);
  169.             car = Cv2.ImRead("car1.png", ImreadModes.Color);
  170.             //透明图
  171.             //B,G,R,A   B,G,R -> 0 黑色 255 白色
  172.             //A为透明度 -> 255为不透明，0为全透。
  173.             var alphaBgr = Cv2.Split(car_bgra);
  174.             mask = alphaBgr[3];
  175.  
  176.             x = 0;
  177.             y = 0;
  178.             width = car.Cols;
  179.             height = car.Rows;
  180.  
  181.             ShowCar();
  182.         }
  183.  
  184.         private void button4_Click(object sender, EventArgs e)
  185.         {
  186.             x = 1120;
  187.             y = 0;
  188.             width = 400;
  189.             height = 400;
  190.  
  191.             Cv2.Resize(mask, mask, new OpenCvSharp.Size(width, height));
  192.             Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
  193.             Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));
  194.             bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
  195.  
  196.             VideoWriter vwriter = new VideoWriter("out.mp4", FourCC.X264, 30, new OpenCvSharp.Size(bgImg.Width, bgImg.Height));
  197.  
  198.             int count = 0;
  199.             for (int i = 0; i < 200; i++)
  200.             {
  201.                 y = y + 10;
  202.  
  203.                 width = width + 2;
  204.                 height = height + 2;
  205.  
  206.                 car_bgra = Cv2.ImRead("car1.png", ImreadModes.Unchanged);
  207.                 car = Cv2.ImRead("car1.png", ImreadModes.Color);
  208.  
  209.                 Cv2.Resize(car_bgra, car_bgra, new OpenCvSharp.Size(width, height));
  210.                 Cv2.Resize(car, car, new OpenCvSharp.Size(width, height));
  211.  
  212.                 var alphaBgr = Cv2.Split(car_bgra);
  213.                 mask = alphaBgr[3];
  214.  
  215.                 roi = new Rect(x, y, width, height);
  216.  
  217.                 if (roi.Bottom > bgImg.Height)
  218.                 {
  219.                     textBox1.Text = "位置越界";
  220.                     break;
  221.                 }
  222.  
  223.                 if (roi.Right > bgImg.Width)
  224.                 {
  225.                     textBox1.Text = "位置越界";
  226.                     break;
  227.                 }
  228.  
  229.                 bgImg = Cv2.ImRead(image_path, ImreadModes.Color);
  230.                 pos = new Mat(bgImg, roi);
  231.                 car.CopyTo(pos, mask);
  232.  
  233.                 Cv2.ImWrite("out/" + i + ".jpg", bgImg);
  234.                 vwriter.Write(bgImg);
  235.                 count++;
  236.                 //pos.Dispose();
  237.                 //bgImg.Dispose();
  238.             }
  239.             pictureBox2.Image = new Bitmap(bgImg.ToMemoryStream());
  240.  
  241.             //Cv2.ImWrite("result.jpg", bgImg);
  242.             //double costTime = stopwatch.Elapsed.TotalMilliseconds;
  243.             //textBox1.Text = $"耗时:{costTime:F2}ms";
  244.             textBox1.Text = "生成完毕！count=" + count.ToString();
  245.             textBox1.Text += string.Format("x={0};y={1};width={2};height={3}", x, y, width, height);
  246.             vwriter.Release();
  247.         }
  248.     }
  249. }

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